Different Esters can have impact on the actual average dosing you experience. That is why even if you take Test C & Test E at the same amount per week, you will likely have a slightly higher average level on Test C than Test E due to how to is absorbed & its half life. For Test C & Test P, some of this may come into play but anecdotal experiences are almost always going to be conflicting.

Consider this: Someone takes Test C after taking Test P, but their average levels increase overall to cause the body to take notice & increase aromatase action, then increasing E. Was the Test P better for libido or was the Test C providing a side effect that suppressed the libido in that specific case because that person's "sweet spot" for aromatase was overshot? There's too many small things like that which come down to a personal level that generalizations just won't work.

For why folks tend to take Test C over everything else, it's almost unanimously cost. It's just the most popular for it's easy half-life to compliance of use with needle fatigue, which means more companies put money into producing it, which lowers the cost. Then companies see the lower cost & only sell that for their services. Which creates more of a feedback loop. A good example: We can work with many types of Test, but if you wanted the same dose of Test E as you are with our normal Test C, we're going to charge you the cost difference between the two & most people don't like that.

For ED or EoD, this is probably not needed in TRT if you are on true TRT and not a cycle. The main reason to go to three times weekly, EoD, or ED is to lower T spikes to reduce E transfer. If you're at reasonable doses, it's pretty rare that using it ED instead of twice weekly is the secret to not needing to take an AI at your dose. It may be more noticeable at higher doses for those who may not be truly on TRT, but therapeutically those approaches are not very common because they're somewhat overkill & will cause needle fatigue.